Simplex Trading Portfolio holdings
Simplex Trading, founded in 2004 and headquartered in Chicago, Illinois, is a technology-driven proprietary trading firm specializing in market-making and liquidity provision, primarily in U.S. equity options and futures options. Leveraging advanced proprietary software and data-driven analysis, the firm optimizes trading strategies and develops innovative solutions to capitalize on financial market opportunities, maintaining a competitive edge through automation and a collaborative team of technologists and traders. With a workforce exceeding 300 and led by CEO Erik Swanson since 2014, Simplex operates with a low-ego, high-intelligence culture, focusing on minimal bureaucracy and rapid execution, while also making strategic venture capital investments in fintech startups. Recognized as a top workplace in Chicago by Built In’s 2025 awards, Simplex continues to evolve, blending cutting-edge technology with a commitment to market efficiency and growth.
Top Buys
| Rank | Stock | Value |
|---|---|---|
| 1 |
Amazon
AMZN
|
+$45.9M |
| 2 |
iShares Russell 2000 ETF
IWM
|
+$30.1M |
| 3 |
TWX
Time Warner Inc
TWX
|
+$25.8M |
| 4 |
Booking.com
BKNG
|
+$22.5M |
| 5 |
Alphabet (Google) Class C
GOOG
|
+$17.7M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$43.6M |
| 2 |
Amgen
AMGN
|
+$33.2M |
| 3 |
Baidu
BIDU
|
+$19.3M |
| 4 |
Alphabet (Google) Class A
GOOGL
|
+$17.3M |
| 5 |
Micron Technology
MU
|
+$17.1M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 14.31% |
| 2 | Technology | 13.17% |
| 3 | Communication Services | 11.81% |
| 4 | Healthcare | 4.06% |
| 5 | Financials | 3.84% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
76
SLB Ltd
SLB
$69.7B
| $5.06M | 0.21% |
72,543
-151,152
| -68% | -$9.99M |
|
|
CELG
77
CALL
DELISTED
Celgene Corp
CELG
| $4.97M | 0.2% |
3,774
-535
| -12% | -$72.9K |
|
78
Caterpillar
CAT
$410B
| $4.97M | 0.2% |
+39,850
| New | +$4.59M |
|
79
iShares MSCI Brazil ETF
EWZ
$9.02B
| $4.92M | 0.2% |
+117,933
| New | +$4.61M |
|
80
Goldman Sachs
GS
$320B
| $4.89M | 0.2% |
20,615
-21,816
| -51% | -$4.92M |
|
81
CALL
Boeing
BA
$161B
| $4.82M | 0.2% |
3,451
+332
| +11% | +$77.4K |
|
|
82
CALL
Micron Technology
MU
$1.1T
| $4.62M | 0.19% |
8,240
-1,195
| -13% | -$37.8K |
|
83
GE Aerospace
GE
$353B
| $4.62M | 0.19% |
39,834
-3,501
| -8% | -$423K |
|
84
State Street Health Care Select Sector SPDR ETF
XLV
$41.5B
| $4.6M | 0.19% |
+56,313
| New | +$4.52M |
|
|
MOMO
85
Hello Group
MOMO
$891M
| $4.6M | 0.19% |
146,695
+110,994
| +311% | +$4.41M |
|
86
Bunge Global
BG
$23.6B
| $4.58M | 0.19% |
65,905
+30,226
| +85% | +$2.29M |
|
|
DISH
87
DELISTED
DISH Network Corp.
DISH
| $4.57M | 0.19% |
84,228
+21,698
| +35% | +$1.28M |
|
88
PUT
Invesco QQQ Trust
QQQ
$471B
| $4.5M | 0.18% |
28,090
-15,944
| -36% | -$2.28M |
|
89
ProShares UltraPro S&P 500
UPRO
$5.31B
| $4.45M | 0.18% |
229,380
+84,210
| +58% | +$1.54M |
|
90
PUT
IBM
IBM
$198B
| $4.42M | 0.18% |
5,987
-2,609
| -30% | -$363K |
|
91
Bausch Health
BHC
$1.69B
| $4.42M | 0.18% |
308,500
+201,796
| +189% | +$3.05M |
|
|
AGN
92
PUT
DELISTED
Allergan plc
AGN
| $4.41M | 0.18% |
3,283
+486
| +17% | +$113K |
|
93
Autodesk
ADSK
$44.6B
| $4.41M | 0.18% |
39,259
+12,228
| +45% | +$1.35M |
|
|
94
PUT
Booking.com
BKNG
$139B
| $4.31M | 0.18% |
27,925
+500
| +2% | +$37.9K |
|
95
PUT
NVIDIA
NVDA
$5.02T
| $4.3M | 0.18% |
461,160
+54,400
| +13% | +$226K |
|
|
RTN
96
DELISTED
Raytheon Company
RTN
| $4.3M | 0.18% |
+23,038
| New | +$4.06M |
|
97
ProShares UltraPro QQQ
TQQQ
$34.7B
| $4.28M | 0.17% |
+900,024
| New | +$4.11M |
|
98
Comcast
CMCSA
$85.1B
| $4.27M | 0.17% |
110,882
+110,782
| +110,782% | +$4.36M |
|
99
Vale
VALE
$60.6B
| $4.25M | 0.17% |
422,361
+220,609
| +109% | +$2.22M |
|
100
PUT
Alibaba
BABA
$283B
| $4.23M | 0.17% |
10,851
-1,268
| -10% | -$206K |
|
Similar funds
Simplex Trading's Q3 2017 Portfolio in Review
As of Q3 2017, Simplex Trading held 7,357 positions worth $2.45B, up 6.4% from $2.3B the previous quarter. Its ten largest holdings account for 24% of the portfolio.
Simplex Trading's Q3 2017 filing shows 1,313 new, 2,078 increased, 2,339 reduced and 1,500 closed positions. Its largest new stake was iShares Russell 2000 ETF: 214,170 shares worth $31.7M. The largest sale was State Street SPDR S&P 500 ETF Trust, an estimated $43.6M.
By sector, the portfolio is most concentrated in Consumer Discretionary at 14% of assets, up from 9.7% a quarter earlier, followed by Technology and Communication Services.
- Simplex Trading's largest Q3 2017 buy was iShares Russell 2000 ETF: 214,170 shares worth $31.7M.
- Simplex Trading added most to Amazon in Q3 2017, an estimated $45.9M increase.
- Simplex Trading's biggest Q3 2017 reduction was Baidu, cutting an estimated $19.3M.
- Simplex Trading fully exited State Street SPDR S&P 500 ETF Trust in Q3 2017, selling an estimated $43.6M.
- Simplex Trading's ten largest holdings make up 24% of its $2.45B portfolio in Q3 2017.
- Simplex Trading opened 1,313 new positions and closed 1,500 in Q3 2017.
- Simplex Trading's portfolio value rose 6.4% quarter-over-quarter to $2.45B.
Based on Simplex Trading's 13F filing for Q3 2017, filed 25 Oct 2017.